142642111 has 2 divisors, whose sum is σ = 142642112. Its totient is φ = 142642110.

The previous prime is 142642099. The next prime is 142642127. The reversal of 142642111 is 111246241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142642111 - 2⁹ = 142641599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142642151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71321055 + 71321056.

It is an arithmetic number, because the mean of its divisors is an integer number (71321056).

Almost surely, 2^142642111 is an apocalyptic number.

142642111 is a deficient number, since it is larger than the sum of its proper divisors (1).

142642111 is an equidigital number, since it uses as much as digits as its factorization.

142642111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 22.

The square root of 142642111 is about 11943.2872777975. The cubic root of 142642111 is about 522.4955377625.

Adding to 142642111 its reverse (111246241), we get a palindrome (253888352).

The spelling of 142642111 in words is "one hundred forty-two million, six hundred forty-two thousand, one hundred eleven".